/**
 * @description  : GPS坐标转换工具类
 * @descriptionDetail : GPS坐标转换工具类
 * @copyright    : 浙江烟草
 * @author       : mc
 * @create       : 2022-11-04 15:57:27
 */
export default {
  createNew:function(){
    let GPSTransformation = {};
    GPSTransformation.BAIDU_LBS_TYPE = "bd09ll";
    GPSTransformation.pi = 3.1415926535897932384626;
    GPSTransformation.a = 6378245.0;
    GPSTransformation.ee = 0.00669342162296594323;
	
    GPSTransformation.transformLon = function( x,  y) {
      let ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1
				* Math.sqrt(Math.abs(x));
      ret += (20.0 * Math.sin(6.0 * x * this.pi) + 20.0 * Math.sin(2.0 * x * this.pi)) * 2.0 / 3.0;
      ret += (20.0 * Math.sin(x * this.pi) + 40.0 * Math.sin(x / 3.0 * this.pi)) * 2.0 / 3.0;
      ret += (150.0 * Math.sin(x / 12.0 * this.pi) + 300.0 * Math.sin(x / 30.0
				* this.pi)) * 2.0 / 3.0;
      return ret;
    };
	
    GPSTransformation.transformLat = function( x,  y) {
      let ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y
				+ 0.2 * Math.sqrt(Math.abs(x));
      ret += (20.0 * Math.sin(6.0 * x * this.pi) + 20.0 * Math.sin(2.0 * x * this.pi)) * 2.0 / 3.0;
      ret += (20.0 * Math.sin(y * this.pi) + 40.0 * Math.sin(y / 3.0 * this.pi)) * 2.0 / 3.0;
      ret += (160.0 * Math.sin(y / 12.0 * this.pi) + 320 * Math.sin(y * this.pi / 30.0)) * 2.0 / 3.0;
      return ret;
    };
	
    GPSTransformation.outOfChina = function( lat,  lon) {
      if (lon < 72.004 || lon > 137.8347)
        return true;
      if (lat < 0.8293 || lat > 55.8271)
        return true;
      return false;
    };
	
    /**
	 * (BD-09)-->84
	 * @param bd_lat
	 * @param bd_lon
	 * @return
	 */
    GPSTransformation.bd09_To_Gps84 = function( bd_lat,  bd_lon) {
      let gcj02 = this.bd09_To_Gcj02(bd_lat, bd_lon);
      let map84 = this.gcj_To_Gps84(gcj02[0],
        gcj02[1]);
      return map84;
    };
	
    /**
	 * * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标
	 */
    GPSTransformation.bd09_To_Gcj02 = function( bd_lat,  bd_lon){
      let x = bd_lon - 0.0065; let y = bd_lat - 0.006;
      let z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * this.pi);
      let theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * this.pi);
      let gg_lon = z * Math.cos(theta);
      let gg_lat = z * Math.sin(theta);
      return [gg_lat, gg_lon,];
    };
    /**
	 * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
	 * 
	 * @param gg_lat
	 * @param gg_lon
	 */
    GPSTransformation.gcj02_To_Bd09 = function( gg_lat,  gg_lon) {
      let x = gg_lon; let y = gg_lat;
      let z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * this.pi);
      let theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * this.pi);
      let bd_lon = z * Math.cos(theta) + 0.0065;
      let bd_lat = z * Math.sin(theta) + 0.006;
      return [bd_lat, bd_lon,];
    };
	
    GPSTransformation.transform = function( lat,  lon) {
      if (this.outOfChina(lat, lon)) {
        return [lat, lon,];
      }
      let dLat = transformLat(lon - 105.0, lat - 35.0);
      let dLon = transformLon(lon - 105.0, lat - 35.0);
      let radLat = lat / 180.0 * this.pi;
      let magic = Math.sin(radLat);
      magic = 1 - this.ee * magic * magic;
      let sqrtMagic = Math.sqrt(magic);
      dLat = (dLat * 180.0) / ((this.a * (1 - this.ee)) / (magic * sqrtMagic) * this.pi);
      dLon = (dLon * 180.0) / (this.a / sqrtMagic * Math.cos(radLat) * this.pi);
      let mgLat = lat + dLat;
      let mgLon = lon + dLon;
      return [mgLat, mgLon,];
    };
	
    /**
	 * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
	 * */
    GPSTransformation.gcj_To_Gps84 = function( lat,  lon) {
      let gps = this.transform(lat, lon);
      let lontitude = lon * 2 - gps.getWgLon();
      let latitude = lat * 2 - gps.getWgLat();
      return [latitude, lontitude,];
    };
	
    /**
	 * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
	 * 
	 * @param lat
	 * @param lon
	 * @return
	 */
    GPSTransformation.gps84_To_Gcj02 = function( lat,  lon) {
      if (this.outOfChina(lat, lon)) {
        return null;
      }
      let dLat = this.transformLat(lon - 105.0, lat - 35.0);
      let dLon = this.transformLon(lon - 105.0, lat - 35.0);
      let radLat = lat / 180.0 * this.pi;
      let magic = Math.sin(radLat);
      magic = 1 - this.ee * magic * magic;
      let sqrtMagic = Math.sqrt(magic);
      dLat = (dLat * 180.0) / ((this.a * (1 - this.ee)) / (magic * sqrtMagic) * this.pi);
      dLon = (dLon * 180.0) / (this.a / sqrtMagic * Math.cos(radLat) * this.pi);
      let mgLat = lat + dLat;
      let mgLon = lon + dLon;
      return [mgLat, mgLon,];
    };
	
    return GPSTransformation;
  },
}